Internal-combustion engine.



M. VERNAZ & P. PIGTET.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED JAN-6, 1914.

Patented July 28, 1914.

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MARCEL VERNAZ, 0F ANNEMASSE, FRANCE, AND PIERRE PICTET, 0F GENEVA, SWITZERLAND.

INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

Patented July 28, 1914.

Original application filed October 27, 1913, Serial No. 797,546. Divided and this application filed January 6, 1914. Serial No. 810,629.

To all whom it may concern Be it known that we, MAnonL VERNAZ, a citizen of the French Republic, and resident of Annemasse, Haute Sa'voie, France, and PIERRE Piornr, a citizen of the Helvetic Confederacy, and resident of Geneva, Switzerland, have invented certain new and useful Improvements in Internal'Combustion Engines, of which the following is a specification.

This invention relates to improvements in internal combustion engines, and is a division of our application for patent filed October 27, 1913, Serial No. 797,546.

. The object of the invention is to provide a resilient port closing element or valve for controlling the admission of gas, movable by frictional contact with a reciprocating sleeve operating in the cylinder, said sleeve having a port with which the resilient element cooperates.

The invention also comprehends improvementsin the details .of construction and arrangement of parts which will be hereinafter described and particularly pointed out in the claims.

In the accompanying drawings: Figure 1 is a vertical section of the cylinder and cooperating parts of our improved engine; Fig. 2 is a similar vie-w of a different form of the invention; and Fig. 3 is a detail cross section on the line AB of Fig. 2.

e indicates a cylinder, provided with a head 9, formed with a depending annular extension 9', the major portion of the outer wall of which is spaced from the wall of the cylinder to form an annular recess b. The annular extension is formed intermediate its length with a partition 9', which forms the top of the cylinder and in this partition the spark plug, indicated conventionally at 9 is located. The outer wall of the annular depression is formed with an annular recess 7)", and registering with the bottom of this recess is a port a, which communicates with the interior of the cylinder below the partition Adjacent port a, the cylinder is provided with an inlet port 0, and on the opposite side and below the level of port'c, the cylinder is provided with an exhaust port f. Fitting in the recess N, is an annular resilient cut off slide or valve 7), which is confined in said recess by a sleeve 8, to be described hereafter. The length of the recess b, is less than the length of the recess 1), whereby to allow of sullicient movement for opening the port (1. Operating in the cylinder 6 is a sleeve 3, the upper portion of which snugly fits in the recess 5. This sleeve is formed with an inlet port 25, adapted at predetermined times to register with the ports a. and 0, while in the opposite wall of the sleeve is an exhaust port a, which at prede tel-mined times registers with the exhaust port f. The sleeve 8 is reciprocated by a crank j, mounted on a shaft Z, a connecting rod A: connecting the crank to the sleeve. A piston m operates within the sleeve and is rcciprocated by a crank 72 on a shaft 0, a conuectingrod n connecting the piston with the crank. In the drawing the piston m is shown at the upper end of its stroke, while the sleeve .9 is still moving upwardly.

WVhen the sleeve 8 starts on its upward stroke, the frictional engagement of the resilient valve b, with the inner surface of said sleeve causes the latter to move the valve upwardly and open port a, as shown in Fig. 1. The upward movement of the valve is limited by the upper wall of the recess b and, though the movement ceases when the port is opened, the sleeve 8 continues to move upwardly and at the proper time port t will register with the port a, and a charge will be admitted to the cylinder. The cranks y' and n are so timed that when ports a and t register, the piston m descends and draws the char e into the cylinder. The charge having IJeen admitted, the sleeve .9 continues to move up and port a will be closed and in time the piston on will again move up and compress the charge. Now, when the sleeve .9 commences to move down, it will by frictional engagement with the valve, draw the latter down into engagement with the lower wall of recess 1), and close port a, while port t is passing to prevent the escape of the charge. \Vheu the sleeve 8 moves up and just prior to the full registration of ports a and t, ports a and f register to exhaust the spent gases. In order to accomplish the foregoing function, shaft Z makes one revolution to two revolutions of shaft 0, this timing being necessary to impart the movement to both sleeve and piston.

In the form of the invention illustrated in Figs. 2 and 3, the resilient valve I) is substantially semi-circular, and the recess b in which the valve fits is of corresponding shape. In this instance the recess 6 is formed in the outer wall of the sleeve 8, and the valve frictionally engages the inner wall of the cylinder. This arrangement therefore places the valve Z) between the sleeve and the cylinder, whereas, in the preferred form of the invention, the valve is located between the sleeve and the depending annular portion of the head 9. By placing the valve as shown in Fi s. 2 and 3, the ports a and t register when the sleeve moves down. This is due to the fact that the valve is engaged by the upper wall of recess 1). When the sleeve moves, and of course, when said sleeve moves up, it follows that the valve will be engaged by the lower wall of recess 6, and close port a.

What we claim is 1. In an internal cembustion engine, the combination of a cylinder formed with an inlet port and an outlet port, a head. at the end ofthe cylinder, said head extending into the cylinder and spaced from the walls thereof to form a recess, the head having an inlet opposite the inlet port in the cylinder,

a sleeve operating in the cylinder, the upper end of the sleeve sliding in the recess, said sleeve having inlet and exhaust ports which at predetermined times register with the inlet and exhaust ports in the cylinder, aresilient valve interposed between the head and the cylinder and slidable frictionally by the sleeve to control the admission of a charge to the cylinder, means for reciprocating the sleeve in the cylinder to operate the valve and admit a charge, a piston operating in the sleeve, and means for operating the piston, the sleeve operating means operating the sleeve twice as fast as the speed of the piston.

2. In an internal combustion engine, the combination of a cylinder formed with inlet and exhaust ports, a head extending within the cylinder and spaced from the walls of the latter to form a recess, the outer wall of 7 the head having a recess and said head having an inlet port opposite the inlet port in the cylinder and registering with the recess in the wall, a resilient valve mounted in the recess, in the head, said valve being of less length than that of the recess, a sleeve in the cylinder, the upper end of the sleeve operating in the recess formed between the head and the cylinder, said sleeve having inlet and exhaust ports which at predetermined times register with the corresponding ports in the cylinder and head, a piston operating in the sleeve; means for reciprocating the piston, and means for reciprocating the sleeve twice as fast as the reciprocation of the piston.

3. In an internal combustion engine, the combination of a cylinder formed with an inlet port and an outlet port, a head at the end of the cylinder, said head extending into the cylinder and spaced from the walls thereof to form a recess, 'a sleeve operating in the cylinder, the upper end of the sleeve sliding in the recess, said sleeve having inlet and exhaust ports which at predetermined times register with the inlet and exhaust ports in the cylinder, a resilient valve interposed between the head and the cylinder and slidable frictionally by the sleeve to control the admission of a charge to the cylinder,

means for reciprocating the sleeve in the cylinder to operate the valve and admit a charge, a piston operating in the sleeve, and means for operating the piston, the sleeve operating means operating the sleeve twice as fast as the speed of the piston.

In testimony whereof we have hereunto set our hands in presence of two witnesses. MARCEL VERNAZ. PIERRE PICTEI. Witnesses as to M. Vernaz:

EARNEN, CHAZETTE. Witnesses as to P. Pictet:

Louis H. MUNIcRY, lfinLIcIEN V'ILLIER. 

